Read Sections from web.config Not Located in Root

<?xml version="1.0"?>
<configuration>
  <configSections>
    <!--The following code declares a section group called Group1. -->
    <sectionGroup name="Group1">
      <section name="Section1"
       type="System.Configuration.NameValueSectionHandler" />
      <section name="Section2"
       type="System.Configuration.NameValueSectionHandler" />
    </sectionGroup>
  </configSections>

  <Group1>
    <Section1>
      <add key="Setting1" value="value1" />
      <add key="Setting2" value="value2" />
    </Section1>
    <Section2>
      <add key="Setting1" value="value12" />
      <add key="Setting2" value="value22" />
    </Section2>
  </Group1>
</configuration>